Drill press



Aug. 16, 1949- G. c. RUSSELL DRILL PRESS 2 Sheets-Sheet 1 Filed Oct. 10, 1945 liweiiiofl: vefl C. Bums 23,

68 0 by v flioifiaqys Aug. 16, 1949.

G. c. RUSSELL 2,479,515

DRILL PRESS Filed Oct. 10, 1945 2 Sheets-Sheet 2 6'8 36 A T a7 a4 lewenom aamvew alimsei dilimmegs Patented Aug. 16, 1949 UNITED STATES PATENT OFFICE 2,479,515 DRILL PRESS Grover 0. Russell, Needham, Mass. Application October 10,}945, Serial No. 621,464

This invention relates to improvements in drill presses and particularly todrill-presses having mean by which the drill head units and the table units may be independently adjusted on their supporting posts or columns with mechanical advantage.

In all drill presses, where the drill head units and the table units are clamped to their supporting posts, by releasing the clamping means, the units may be adjusted as desired. Such adjustments are difficult to efiect, particularly where a drill head. unitincludes' a motor especially in the case of.women or juvenile operators. This difiiculty ha been recognized and certain proposals have been made to provide means whereby the units may be. raised or lowered along their post with mechanical advantage.

A drill press in accordance with my invention has first and-second posts. vThe first. post slidably supports the drill head unit and the table unit. Each unit has a clamp by which it may be locked to the first post and crank controlled pinion means meshing with a rack surface on the second post. The upper end of the posts are interconnected to ensure rigidity and the table unit may conveniently be mounted to swing about the first post into a position determined by an adjustable stop engaging with the second post. The table itself, i specially designed to permit its rotary adjustment while providing the recognized advantages of generally rectangular or square shape.

These features, together with a hinged motor with a latch for holding it in a tilted position to release the tension on the belt when making speed changes of the belt or the pulleys, contribute to make drill presses in accordance with my invention of sturdy construction and easy to adjust with the crank controlled means of each unit being readily accessible to ensure maximum convenience to the operator.

In the accompanying drawings, I have shown an illustrative embodiment of my invention from which its several novel features and advantages will be readily apparent. In the drawings:

Fig. 1 is a plan view of a drill press in accordance with my invention.

Fig. 2 i a side elevation of the drill press of Fig. 1 partly broken away to shorten the figure length.

Fig. 3 is a view of the adjustable stop by which swinging of the work table is limited.

Fig. 4 is a section, on an enlarged scale, along the lines 4-4, of Fig. 2, and

3 Claims. (01. 77-63) Fig. 5 is a somewhat similar view along the lines 55, of Fig. 2.

In the embodiment of my invention shown in the drawings, I have indicated at ID a base which supports vertically disposed posts or column H and I2.

At l3 and M, respectively, I have indicated generally the drill head unit and the table unit. The

units I 3 and I4 have clamping hubs l5 and 16 respectively, controlled by conventional clamping means I! and I8 so that the units may be slidably supported by the post H and locked thereto in any desired position by setting up the clamping means.

I have not detailed the construction of the drill head unit but have indicated a spindle IS, a belt drive 20 connecting the pulley 2| driven by the motor 22 and the spindle rotating pulleyconcealed by the removable cover 23. The hand bar 24 is conventional and is actuated to advance a rotating drill against work supported on the table 25 of the table unit M.

The units l3 and I4 have housings 2B and 21, respectively, and these are apertured to receive the post l2. The posts [I and I2 are in alinement with the spindle l9 and the post l2 has a rack surface 28 disposed at one side of a plane inclusive of the posts. As may be seen in Fig. 4, the

housing 25 supports a worm 29 rotated by a crank 30 and meshing with a worm gear 3| to which is connected a pinion 32 rotatably supported by the housing 26. The pinion 32 meshes with the rack surface 28. The worm gear 3| and the pinion 32 are fast on a shaft 33. As shown in Fig. 5, I mount in the housing 2! a shaft 34 for the worm gear 35 and the pinion 36 connected thereto. The worm gear 35 meshes with the worm 31 rotatable with the crank 38. The pinion 38 meshes with the rack surface 28. Preferably, the cranks 30 and 38 are located on the right side of my drill press for maximum convenience in adjusting the relation of the units to each other or to the base (0.

I interconnect the upper ends of the posts H and i 2 as at 39 to ensure that the post I2 re mains rigid when either clamping means I1, I8 are released and either crank 30, 38 operated to raise or lower either of the units.

I have shown the motor 22 as mounted on a plate 40 hinged as at 4| to a plate 42 fast on rods 43 anchored in the housing 26 by set screws 44. The plate 42 has a stud 45 extending through a slot 46 in an arm 41 pivotally carried by the plate 40. I form one end of the slot 46 with a pocket 48 which enables the motor 22 to be latched in a ,tewhichth unit Mmay be swun tilted position as when a belt 20 is being replaced or shifted on the pulleys.

My table 25 is rotatably mounted on its unit I4 and is held in desired position by clamping means 49. The table 25 is preferably rectangular and has rounded corners. The maximum distance from the center of the table to any corner is less than the distance from that center to the post I I so that the table 25 may be turned relative to the unit L4 and lockedinany selected position.

While the housing 21 may be rigidly connected to the unit I4 or to an integral part thereof, I prefer to provide a connection therebetween so that the table 25 may be swung relative t-o the post H and still permit the operator to be able to raise and lower the table unit M by actuating the crank 38 when the clamping means 18 are released. This connection may conveniently consist of a flange 50 on the hub l6 disposed between jaws 5| on the housing- 21. At 52, I have shown an adjustable stop hinged to the unit [4 for movement between its dotted line position of Fig. 2 n hich maximum rotation f he n t 1 p rmil tr and its full li e p ition in which it lls ees the. post l2, The stop ha a se scr w 53 by which adjustments are made in the extent Fromthe foregoing, it will be apparent that drill presses in accorflance with my invention provide adaptability toa wide range of conditions as we l as ma in itpr vide for h units to be ndep n ently diuste with max mum ase and :Qnvenienee.

What I therefore claim and desire tosecure by Let er Pa ent i 1.7 11 a ri l press, afirst post a ond p st rearwardly of said first post and having a rack surface, a unit slidably supported by said first post, means to lock vSaid unit to said first post, said unit including a housing slidably supported y said ec nd post, andrcranke ntroned pinion 1 means supported in said housing in mesh with said rack surface to enable said unit to be raised and lowered with mechanical advantage when said locking means are released.

2. In a drill press, a first post, a second post rearwardly of said first post and having a rack surface, a table unit slidably supported by said first post, means to lock said unit to said first post, a housing slidably supported by said second post, a crank cpntrolled pinionmeans in said housing in mesh-with said rack surface to enable said housing to be raised and lowered with mechanical advantage, and said housing and said unitincluding coacting jaw and flange portions to enable said unit to be turned with said first postasits axis and to be raised or lowered withsaidhousing when said lock means are released.

3. The drill press of claim 2 and a stop hinged to the unit for movement between a position in which it engasesthe second post and a position in which the turningpf the unit is unblocked.

Q- U LL- REFERENCES CITED The following references are of record in the fileof thispatent:

SlAliEfi PA ENTS:

Number Name Date 1,135,767 Cheshire Apr. 13, 1915 1,426,496 Norrisn Aug. 22, 1922 2,122,966 Tautz July 5, 1938 2,123,337 Kosman-et-al. July 12, 1938 2,154,745 Hedgpeth Apr. 18, 1939 FOREIGN PATENTS Number Country; Date 2 01 Great Brit in "a"- De g 1 

